If you need to protect your confidential files in office or shared desktops, here is the robust command line and GUI utility to do password based encryption using AES. It can encrypt and decrypt a folder structure containing any number of files.
tkpgp is a gui front-end to the Gnu Privacy Guard PGP implementation. It provides a selection-based channel that enables simple and convenient integration with other applications.
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Ruby script framework for the encryption and decryption of email according the GPG/MIME Format (RFC 3156). It can be used for e.g. for Apple' Mail as replacement for GPGMail.
This program can encrypt / decrypt strings with the Caesar's Cipher.
It also can try to crack an encrypted string with brute force.
(C) Daniel Steinhauer <pik-9@users.sourceforge.net>
This is the extended euclidean algorithm implemented in haskell.
It will put every single step of the algorithm in a file and show the actual result and everything in between.
Cryptography Workshop is a small yet powerful tool for cryptography and cryptanalysis. It's focused more on classic cryptography. It is currently in alpha and under development.
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SLEncrypt is a python module for encryption with 11 ciphers at the moment, including ADFGVX, Autokey, Caesar/ROT13, Vigenere, XOR and a lot more. It contains functions allowing you to easily encrypt/decrypt files. The code is about 95% PEP 8 compilant.
Advanced Perl script for DES password cracking. Might be handy for password QA. Brut-force, load Unix passwd/shadow, multi hash crack, input/output file, save/resume cracking state.
It load the current public-timestamp-block from publictimestamp.org and store it in a file to use it e.g. as a signature in an e-mail software.
The project is inactive and not under development anymore.
Sharemind is a secure multiparty computation system that allows you to process data without seeing it.
IMPORTANT: The version available on this page is a seriously outdated version that is kept available as an educational tool. More recent versions with more features and better quality are available from http://sharemind.cyber.ee/.
Rinecrypt uses the Gladman implentation of the AES algorithm
Rijndael and a SHA256 hash among other things, to encrypt/decrypt
a file with a user supplied passsword.
This project involves implementing simulations of Enigma machines and the Turing bombe on various parallel-computing systems including multi-processor PCs, Linux clusters, and modern enhanced graphic cards.
The aim of this small program is to parse your address book (Evolution address book or VCard file for the moment) and check if some of your contacts have uploaded a PGP public key on a key server.
Lite Security Module: a daemon to handle PKCS11 Secure Boxes
Lite Security Module: a daemon to handle Secure Boxes (files containing cryptographic keys, X509 certificates and data objects), accessible through a PKCS#11 library, supporting non-certified (lite) Software or Hardware Security Modules (www.clizio.com)
Pure managed C# implementation of well-known cryptographic hash functions such as SHA-family (SHA0, SHA1, SHA2), MD-family (MD2, MD4, MD5), RIPEMD, Tiger, Haval, Snefru and others.
Moved to Github: https://github.com/AndreyRusyaev/acryptohashnet
sanesigner is a high level digital signature api component. it support generating and verifying digital signatures as well as encryption and decryption using public keys, and lots of other features in between.
Pidgin-paranoia is a plug-in for Pidgin (formerly known as Gaim) that provides information-theoretically secure encrypted conversations using one-time-pads.